Monday, November18, 2019 L-36.com


Marine Weather and Tides
Boston, MA

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:37AMSunset 4:21PM Monday November 18, 2019 12:56 AM EST (05:56 UTC) Moonrise 11:02PMMoonset 1:08PM Illumination 65% Phase: Waning Gibbous; Moon at 21 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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ANZ230 Boston Harbor- 957 Pm Est Sun Nov 17 2019
.gale warning in effect from 6 am est Monday through Monday afternoon...
Overnight..NE winds 15 to 20 kt with gusts up to 25 kt. Waves 2 to 3 ft. A slight chance of light rain late this evening, then light rain likely.
Mon..N winds 15 to 20 kt, increasing to 20 to 25 kt in the afternoon. Gusts up to 35 kt. Waves 2 to 3 ft, except 4 to 6 ft at the outer harbor entrance. Patchy fog. Rain. Vsby 1 to 3 nm.
Mon night..N winds 15 to 20 kt, becoming nw 5 to 10 kt after midnight. Gusts up to 30 kt. Waves around 2 ft, except 5 to 8 ft at the outer harbor entrance. Patchy fog. Showers. Vsby 1 to 3 nm.
Tue..W winds 5 to 10 kt with gusts up to 20 kt. Waves around 2 ft, except 4 to 6 ft at the outer harbor entrance. A chance of showers.
Tue night through Wed night..NW winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 ft.
Thu..NW winds 5 to 10 kt with gusts up to 25 kt. Waves around 2 ft.
Thu night through Fri night..W winds 10 to 15 kt with gusts up to 30 kt. Waves around 2 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height.
ANZ200 957 Pm Est Sun Nov 17 2019
Synopsis for massachusetts and rhode island coastal waters.. An ocean storm will approach from the S tonight, tracking se of nantucket Mon before moving into the maritimes Tue. High pres to the west Wed builds into the waters Thu. A cold front moves across the waters Fri. For information on possible hazardous weather beyond the 24-36 hour forecast period, please visit www.weather.gov/boston and follow the current hazards link above the map on the left.


7 Day Forecast for Marine Location Near Boston, MA
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location: 42.36, -71.02     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 180307
afdbox
area forecast discussion
national weather service boston norton ma
1007 pm est Sun nov 17 2019

Synopsis
A coastal storm will bring some rain and coastal winds late
tonight into Monday, with some light icing just northwest of the
boston to providence corridor. The rain may end as a bit of
snow ice across the interior high terrain of massachusetts late
Monday night into Tuesday morning. Mainly dry and seasonably
chilly weather follows Tuesday afternoon through Thursday
afternoon. A cold front may bring some showers and briefly
milder temperatures Thursday night into Friday. Chillier weather
returns for the start of next weekend.

Near term until 6 am Monday morning
10 pm update...

highlights...

* light icing will likely develop just northwest of the boston
to providence corridor late tonight into Monday morning
details...

it is dry across sne this evening, but we expect spotty drizzle
and freezing drizzle to develop late tonight. Soundings
indicate plenty of dry air in the ice crystal growth region with
saturated low levels suggesting any light precip will be more
drizzle and freezing drizzle. Deeper moisture and steadier rain
begins to move into SE new eng toward daybreak.

Coastal front has set up along the i-95 corridor with temps near
or a bit below freezing just to the west. Given coastal storm
tracking south and east of the benchmark this front will likely
drift a bit to the east toward daybreak as low crosses 70w. This
will allow near freezing temps to spill into the 128 belt and
i95 corridor as light precip is developing. Also dewpoints are
in the 20s interior so potential for some wet bulb cooling as
precip moves in. As a result we expanded the advisory eastward
to the 128 belt and i95 corridor for a period of spotty light
freezing rain drizzle. Still uncertainty on how much light
precipitation we see into the Monday morning commute, but it
only takes a trace to result in hazardous icy travel.

The advisory does not include boston and providence but areas
just to the north and west could see some light icing.

Short term 6 am Monday morning through 6 pm Monday
Highlights...

* light icing likely across parts of the interior through midday
Monday
* NE wind gusts 35 to 45 mph across CAPE islands Monday, with a
few gusts up to 50 mph across the islands
* minor coastal flooding possible along the eastern mass coast
Monday afternoon
details...

1) interior light icing potential...

with the cold air draining across the interior on n-ne winds,
temps will gradually fall to near or below freezing mainly after
midnight. Best chance for colder temps will occur across the
higher inland terrain, which could see the best shot for light
icing. Still need to monitor the placement of the coastal front
and whether it wavers either farther inland or off the coast
overnight.

As the coastal low tracks a bit further offshore than previously
forecast, could see the cooler temps remain further inland, and
the coastal front may not make too much further inroads. This
will be something to monitor closely. In this case, there is
still the potential for some light icing as far east as the
merrimack valley, as well as portions of the ct valley.

Winter weather advisory remains in place from the berkshires to
the merrimack valley. Any icing will be light with amounts a
trace to one tenth of an inch. Temps will be warming above
freezing by midday Monday, so any freezing precip will change
over to all rain.

2) strong wind potential along the coast...

ne low level jet still forecast to reach to around 50 kt as it
slowly lifts north across coastal areas. Peak of strong winds
will move in during the day on Monday, with gusts to 35 to 45
mph over the CAPE islands late tonight and Monday. There is
still the potential to see gusts up to 50 mph on nantucket and
martha's vineyard.

With this in mind, have extended the wind advisory to include
cape cod, and will see the strongest winds on Monday.

Fortunately, given most leaves are off the trees these wind
speeds should not cause too many issues other than a few downed
tree limbs and isolated power outages.

3) minor coastal flooding potential:
see tides coastal flooding section below.

Long term Monday night through Sunday
Highlights...

* showers Mon night early Tue am may end as a bit of snow ice
mainly across the berks and northern worcester hills
* mainly dry seasonably chilly the rest of Tue through thu
afternoon
* milder Thu night into Fri with some showers possible but not
expecting the entire period to be a washout
* chillier temperatures return by the start of next weekend
details...

Monday night into Tuesday morning...

coastal low will lift northeast towards the canadian maritimes
mon night. However, vigorous upper level disturbance will lag
behind and cross the region Mon night into Tue morning. This
should result in showers increasing again in areal coverage
during the late evening and overnight hours. Model cross
sections indicate that thermal profiles will be mild enough for
just liquid precipitation across most of the region. It may
become just cold enough for rain to change to snow ice mainly
across the east slopes of the berks and northern worcester hills
before precipitation ends by late morning tue. Accums of a
coating to 2 inches seem reasonable right now, so some slippery
travel is possible for the high terrain of the berks northern
worcester hills.

Tuesday afternoon through Thursday afternoon...

mainly dry and seasonably chilly weather is on tap tue
afternoon through Thu afternoon with a west to northwest flow.

High temps will mainly be in the 40s. The chilliest day of the
week looks to be wed, behind the passage of a cold front.

Thursday night and Friday...

low pressure tracking well to our northwest, may bring some
showers to the region sometime Thu night and or Fri but not
expecting a washout over this time period. Somewhat milder
temps return Fri ahead of the front, so decent shot many
locations see highs in the 50s.

Saturday and Sunday...

mainly dry and chilly temperatures return behind the cold front
on sat. Will then need to watch a low pressure system that may
approach from the south late Sat night sun. If it gets close
enough may bring some precipitation to the region, but that is
uncertain at this time.

Aviation 03z Monday through Friday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Monday ... Moderate confidence.

Tonight...

conditions will tend to gradually lower with MVFR thresholds
dominating. Ocean enhanced light snow showers flurries will
impact portions of central and interior northeast ma through
about 02z or 03z. Otherwise, should see spotty -ra dz across
coastal terminals develop overnight, but pockets of
-fzra -fzdz just northwest of the bos-pvd terminals. E-ne wind
gusts increase to 30-35 kt across coastal terminals from kghg-
khya-kack and possibly to kewb and kwst.

Monday...

MVFR-ifr conditions in rain and fog. Pockets of -fzra possible
from 12z to around 15z across the interior. N-ne gusts 20-30 kt
across the coastal plain and 30-40 kt CAPE islands.

Kbos taf... Moderate confidence in taf. MVFR to low endVFR
cigs, around 2500-3500 ft, through around 00z. CIGS lower to
1500-2000 ft after 02z.VFR vsbys through most of the night, may
lower to MVFR around or after 08z.

Kbdl taf... Moderate confidence in taf. Low endVFR cigs
continue through around 00z, then lower to MVFR.VFR vsbys
continue through tonight. Chance for spotty -fzra after 10z.

Outlook Monday night through Friday ...

Monday night: mainly ifr, with areas MVFR possible. Windy with
gusts up to 35 kt. Chance shra.

Tuesday: mainlyVFR, with local ifr possible. Breezy. Slight
chance shra.

Tuesday night:VFR.

Wednesday: mainlyVFR, with areas MVFR possible. Breezy.

Wednesday night through Thursday:VFR. Breezy.

Thursday night: mainly MVFR, with areasVFR possible. Breezy.

Chance shra.

Friday: mainly MVFR, with areasVFR possible. Windy with areas
of gusts up to 30 kt. Chance shra.

Marine
Short term through Monday ... Moderate confidence.

Gale warnings continue for all waters. Expect NE winds to peak
late tonight through most of Monday. Wind gusts are forecast to
reach 35 to 45 kt with a few higher gusts possible. Seas will
build up to 15 ft across the eastern outer waters. Vsbys
reduced in rain and fog late tonight and Monday.

Outlook Monday night through Friday ...

Monday night: moderate risk for gale force winds with gusts up
to 35 kt. Rough seas up to 17 ft. Chance of rain showers, patchy
fog.

Tuesday: moderate risk for small craft advisory winds with
gusts up to 30 kt. Rough seas up to 11 ft. Slight chance of rain
showers.

Tuesday night: winds less than 25 kt. Seas up to 5 ft.

Wednesday: low risk for small craft advisory winds with gusts
up to 25 kt. Seas up to 5 ft. Slight chance of rain showers.

Wednesday night: moderate risk for small craft advisory winds
with gusts up to 30 kt. Areas of rough seas.

Thursday: low risk for small craft advisory winds with gusts up
to 25 kt. Local rough seas.

Thursday night: moderate risk for small craft advisory winds
with areas of gusts up to 30 kt. Areas of seas approaching 5 ft.

Chance of rain showers.

Friday: low risk for gale force winds with gusts up to 35 kt.

Areas of rough seas. Chance of rain showers.

Tides coastal flooding
Continue to forecast a storm surge of 1.5 to 2 ft during the
high tide Monday afternoon. Low level jet is expected to arrive
close the same time as the mid afternoon high tide.

Astronomical high tide at boston is 10.3 ft mllw, and 3.7 ft
mllw at nantucket harbor. This will bring pockets of minor
coastal flooding to much of the eastern mass coast. Seas
offshore will build up to 15 ft, which will add to the impact
along the coast and may bring minor beach erosion.

A coastal flood advisory remains in effect for the eastern mass
coast including nantucket. However, the winds and storm surge
will not be high enough to cause a significant coastal flood
event.

Box watches warnings advisories
Ct... Winter weather advisory until 9 am est Monday for ctz002>004.

Ma... Coastal flood advisory from 2 pm to 5 pm est Monday for maz007-
015-016-019-022-024.

Winter weather advisory until 9 am est Monday for maz005-006-
009>014-026.

Winter weather advisory until noon est Monday for maz002>004-
008.

Wind advisory from 6 am to 5 pm est Monday for maz023-024.

Wind advisory from 7 am to 5 pm est Monday for maz022.

Ri... Wind advisory from 6 am to 2 pm est Monday for riz008.

Winter weather advisory until 9 am est Monday for riz001.

Marine... Gale warning until 11 pm est Monday for anz232-254-255.

Gale warning until 8 pm est Monday for anz233>235-237-256.

Gale warning from 6 am to 6 pm est Monday for anz230-236.

Gale warning from 6 am to 11 pm est Monday for anz231.

Gale warning from 4 am Monday to midnight est Monday night for
anz250.

Gale warning from 6 am to 10 pm est Monday for anz251.

Synopsis... Frank evt
near term... Kjc frank evt
short term... Evt
long term... Frank
aviation... Frank evt
marine... Frank evt
tides coastal flooding...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BHBM3 - 8443970 - Boston, MA 2 mi57 min 36°F 44°F1018.4 hPa (-3.1)
44013 - BOSTON 16 NM East of Boston, MA 20 mi67 min NE 21 G 27 46°F 51°F7 ft1018.1 hPa (-3.6)36°F
44029 - Buoy A0102 - Mass. Bay/Stellwagen 27 mi113 min ENE 19 G 25 46°F 51°F6 ft1019.7 hPa
FOXR1 - 8454000 - Providence, RI 43 mi63 min NNE 9.9 G 15 38°F 49°F1017.9 hPa
PVDR1 44 mi57 min N 11 G 16 38°F 1018 hPa (-2.6)32°F
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 46 mi57 min NE 18 G 23 45°F 1017.1 hPa (-2.5)
FRVM3 - 8447386 - Fall River, MA 46 mi63 min 44°F 49°F1017.4 hPa
FRXM3 47 mi63 min 45°F 36°F
IOSN3 - Isle of Shoals, NH 47 mi57 min NNE 26 G 29 37°F 1019.9 hPa (-2.9)29°F
44018 - SE Cape Cod 30NM East of Nantucket, MA 48 mi67 min NE 23 G 25 45°F 7 ft1018 hPa (-3.5)35°F
CPTR1 - 8452944 - Conimicut Light, RI 48 mi57 min NNW 11 G 12 40°F 46°F
BGXN3 - Great Bay Reserve, NH 49 mi72 min N 2.9 33°F 1022 hPa19°F

Wind History for Providence, RI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boston, Logan International Airport, MA1 mi63 minNNW 1010.00 miOvercast38°F28°F68%1019.7 hPa
East Milton, MA11 mi66 minN 10 mi34°F28°F82%1019.6 hPa
Norwood, Norwood Memorial Airport, MA14 mi64 minN 810.00 miOvercast38°F28°F68%1019.3 hPa
Beverly, Beverly Municipal Airport, MA16 mi64 minN 1110.00 miOvercast35°F25°F67%1019.7 hPa
Laurence G Hanscom Field Airport, MA16 mi66 minN 1010.00 miOvercast34°F23°F64%1021.6 hPa

Link to 5 minute data for KBOS

Wind History from BOS (wind in knots)
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Last 24hrN12N11N12N12N13N10N11N11N10N11N11N10N10N10N7N11N8
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Tide / Current Tables for Charlestown, Charles River, Massachusetts
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Charlestown
Click for Map
Mon -- 03:00 AM EST     9.15 feet High Tide
Mon -- 06:38 AM EST     Sunrise
Mon -- 09:02 AM EST     1.21 feet Low Tide
Mon -- 12:08 PM EST     Moonset
Mon -- 03:09 PM EST     10.23 feet High Tide
Mon -- 04:19 PM EST     Sunset
Mon -- 09:41 PM EST     0.04 feet Low Tide
Mon -- 10:01 PM EST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.178.59.28.67.25.33.41.91.21.93.85.97.89.410.29.88.36.23.91.90.40.11.3

Tide / Current Tables for Boston Harbor, Massachusetts Current
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Boston Harbor
Click for Map
Mon -- 02:28 AM EST     -0.00 knots Slack
Mon -- 05:21 AM EST     -0.91 knots Max Ebb
Mon -- 06:37 AM EST     Sunrise
Mon -- 09:12 AM EST     0.00 knots Slack
Mon -- 11:16 AM EST     1.17 knots Max Flood
Mon -- 12:07 PM EST     Moonset
Mon -- 02:48 PM EST     -0.00 knots Slack
Mon -- 04:19 PM EST     Sunset
Mon -- 05:55 PM EST     -1.03 knots Max Ebb
Mon -- 09:47 PM EST     0.00 knots Slack
Mon -- 10:01 PM EST     Moonrise
Mon -- 11:48 PM EST     1.11 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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10.80.3-0.3-0.7-0.9-0.9-0.8-0.6-0.20.71.21.10.90.5-0.1-0.7-1-1-1-0.8-0.60.20.9

Weather Map
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GEOS Local Image of Northeast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Wind Forecast for Boston, MA (0,6,7,8)
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Ground Weather Radar Station Boston, MA
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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.